Textbook lectures underlay for the technologies of business communication, read by an author by the future of ИТ-специалистам on the математико-механическом faculty of the Saint Petersburg state university. The necessary volume of fundamental theoretical material is collected in a textbook, but a basic accent is done on the decision of practical tasks of communication, such as a management by productive conflicts or conduct business correspondences, analysis of personality features of interlocutor and influence of level of emotional intellect on professional activity, description of effective co-operation in a project command, technology of successful public presentation of product.A textbook is intended for the students of institutions of higher learning, passing preparation in the field of informatics and information technologies.